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14 March: what is celebrated today
14 March seems written in two inks. One is precision: numbers, proportions and constants that describe the world with cold elegance. The other is vulnerability: bodies needing diagnosis, rivers needing care, senses wearing down in silence. Today, between formulas and campaigns, the same idea repeats: what is essential must be protected before it is gone.
International Day of Mathematics
Proclaimed by UNESCO and celebrated since 2020, the International Day of Mathematics recognises a discipline that does not exist only in classrooms: it is in architecture, in music, in the algorithms that organise everyday life. Mathematics is a shared language that enables us to understand, build and also imagine.
The theme that brings together ‘Mathematics, Art and Creativity’ reminds us that logic does not cancel out beauty: it guides it. Behind a symmetry, a visual rhythm or a natural pattern, there is usually a structure that the eye perceives even before it can name it.
Pi Day
On 14 March, Pi is also celebrated: the constant that appears when the circumference of a circle is divided by its diameter. Irrational and infinite, Pi has something of a numerical poem about it: it promises an ending, yet continues without end, like a line that always finds another stretch.
Its presence spans centuries and technologies: from the earliest approximations to modern calculations, from classical geometry to contemporary engineering. Celebrating Pi is celebrating human curiosity, that insistence on measuring the round and, in the process, learning to live with what cannot be fully encompassed.
White Day
In Japan and other East Asian countries, 14 March is White Day: a date on which, traditionally, men reciprocate the gifts received on Valentine’s Day. It began with a commercial impetus, but ended up becoming a social ritual of reciprocity.
Beyond chocolate and the codes surrounding gifts, the date speaks of something universal: returning a gesture. In a time of fast-moving relationships, White Day reminds us that gratitude can also be a custom — and that attention, when sincere, carries more weight than the wrapping.
International Day of Action for Rivers
Since 1997, 14 March has called for rivers to be defended: sources of fresh water, biodiversity corridors, living memory for territories and communities. They are complex and fragile systems, exposed to pollution, degradation and decisions that alter their course.
This observance is not limited to ‘celebrating’ nature: it puts it on the agenda. Caring for a river means caring for a specific future: that of the water we drink, the food produced by a riverbank, and the life that depends on a flow that should not become scarce through neglect.
World Endometriosis Day
14 March also raises awareness of endometriosis, a chronic and underdiagnosed disease affecting millions of women. Its paradox is painful: it can be intense, yet still go for years without a name, without proper treatment, without recognition.
That is why this date has a deeply human dimension: listening, researching, supporting. Talking about endometriosis means talking about health, but also about empathy and access to timely medical care, so that pain does not have to ‘prove’ that it exists.
European Day for the Prevention of Cardiovascular Risk
Since 2005, Europe has dedicated 14 March to preventing cardiovascular risk, focusing on modifiable factors: smoking, sedentary lifestyles, poor diet, obesity, hypertension and stress. Prevention here is not a moral slogan, but a life strategy.
The heart is not cared for through a single decision, but through the sum of habits: moving more, eating better, getting enough sleep, reducing toxins, seeking medical help when needed. This day insists on an uncomfortable yet hopeful truth: much can be avoided if action is taken in time.
Brain Awareness Week
At this time of year, Brain Awareness Week continues (usually from 10 to 16 March), an invitation to understand the organ that sustains us from within: thought, memory, emotion and learning. Since 1996, this week has brought neuroscience closer to the public and highlighted the value of research.
It also offers a cultural reflection: the brain does not live apart from modern life. Stress, lack of rest and information overload wear it down. Caring for it is as everyday as sleeping well, reading calmly or making room for silence.
World Glaucoma Week
From 9 to 15 March, World Glaucoma Week is observed, focusing on the prevention of a disease that progresses without making a sound. Glaucoma can progressively damage the optic nerve, and many people do not discover it until advanced stages.
That is why the week stresses a simple action: regular check-ups and attention to risk factors. At its heart, it is a defence of autonomy: seeing means moving, recognising, reading, working, living with less fear. And that asset, when cared for, lasts longer.